Sending email alert based on if condition

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ASP.NET

email

condition

hello, i have table(gridview) with 4 col on of them is expiredate, in code behind i did
if statement to show me only the row that will appear when the expire date in 45 days, (( but now i need when the specific row appear based on expire send email that something will expire and link to page that have table that i did

i search for bit about it, be careful that i cant use sql agent because of sql version don't have it.

thank u..

What I have tried:

<pre>   }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {


        GridView1.Columns[4].Visible = false;
        
        
          Label a = e.Row.FindControl("Label2") as Label;
          Label b = e.Row.FindControl("Label3") as Label;
         
        if ((a != null) & (b!= null))
        {
            DateTime lblDate;
            if ((!DateTime.TryParse(a.Text, out lblDate)) & (!DateTime.TryParse(b.Text, out lblDate)))
            {
                // date time conversion not success 
                // you may have empty or invalid datetime 
                // do something in this case 
                return;
            }
            
            if (lblDate <= DateTime.Today.AddDays(45))
            {

                e.Row.Visible = true;

            }

            else
            {
e.Row.Visible = false;
          
            }